Here are the key points for selecting and installing solar street lamps, covering both procurement considerations and installation guidelines:

I. Key Points for Selecting Solar Street Lamps

1. Solar Panel Efficiency

• Type: Choose high-efficiency monocrystalline or polycrystalline panels. Monocrystalline performs better in low-light conditions.
• Size & Wattage: Match the panel size to the local sunlight duration and lamp power. For example, areas with less sunlight may need larger panels (e.g., 100W+ for 30W lamps in cloudy regions).
• Material: Opt for durable, weather-resistant panels (e.g., tempered glass with IP65 rating)

2. solar street lamps Battery Capacity and Type

• Type:  LiFePO₄ over lead-acid for longer lifespan (5–8 years vs. 3–5 years), higher energy density, and better performance in cold/hot climates.
• Capacity (Ah): Calculate based on daily energy consumption and backup days.
  • Example: A 30W lamp running 10 hours/day uses 300Wh/day. With 3 days of backup, a 12V battery needs:Capacity (Ah)=12V×0.8 (depth of discharge)300Wh×4 (days)≈125Ah

3. solar street lamps LED Lamp Performance

• Lumens & Brightness: Ensure ≥100 lumens/W for efficiency. A 30W lamp should produce ~3,000 lumens.
• Color Temperature: Choose 3,000–4,500K (warm white) for better visibility and comfort; avoid cool white (5,000K+) for residential areas.
• Beam Angle: Select 120–150° for wide coverage or 60–90° for focused lighting (e.g., pathways).

4. solar street lamps Controller Quality

• Functionality: Must have PWM (Pulse Width Modulation) or MPPT (Maximum Power Point Tracking) charging. MPPT is 30% more efficient in low light.
• Protection: Overcharge, over-discharge, and short-circuit protection are essential.

5. solar street lamps Durability and Weather Resistance

• IP Rating: Ensure IP65 (water/dustproof) for the lamp and IP67 for the battery/controller.
• Material: Aluminum alloy or stainless steel fixtures for corrosion resistance.

6. Intelligent Control Features

• Dusk-to-Dawn Sensors: Automatic on/off based on ambient light.
• Timer/Adjustable Brightness: Optional features to save energy (e.g., 100% brightness for the first 3 hours, then 50% overnight).

7. solar street lamps Cost and Warranty

• Balance Price vs. Quality: Avoid ultra-cheap models with short-lived batteries.
• Warranty: Look for 3–5 years on panels/lamps and 2–3 years on batteries.

II. Key Points for Installing Solar Street Lamps

1. Site Selection

• Sunlight Exposure: Install panels in areas with direct sunlight for 6–8 hours/day, away from trees or buildings that cast shadows.
• Height and Spacing:
  • Height: 6–8 meters for roads; 3–5 meters for pathways.
  • Spacing: 20–30 meters between lamps (adjust based on brightness and beam angle).

2. solar street lamps Mounting and Structural Stability

• Pole Material: Galvanized steel or aluminum poles with anti-rust coating.
• Foundation: Concrete base (size depends on pole height; e.g., 60cm×60cm×100cm for an 8m pole) to withstand wind (≥100 km/h).

3. Wiring and Connection

• Cable Gauge: Use low-voltage wires (e.g., 2.5mm²) with waterproof connectors.
• Battery Placement: Install batteries in shaded, ventilated areas (e.g., underground boxes with drainage) to avoid overheating.

4. solar street lamps System Testing

• Charge Test: Let the panel charge the battery for 1–2 days before first use.
• Function Test: Verify automatic on/off, brightness levels, and backup duration (e.g., simulate 3 days of no sunlight to check performance).

5. Safety and Maintenance

• Grounding: Ensure the pole is grounded to prevent lightning strikes.
• Routine Checks: Clean panels quarterly, inspect wiring for corrosion, and replace batteries as needed.

III. solar street lamps Additional Considerations

• Local Climate:
  • Cold regions: Use LiFePO₄ batteries (operate at -20°C).
  • High humidity: Prioritize sealed, waterproof components.
• Regulations: Comply with local lighting standards (e.g., IEC standards for brightness and glare control).
• Future Expansion: Choose modular systems that allow upgrading panels or batteries.